Simultaneous Nadir Overpasses (SNOs) between GOES-17 and METOP-B
TLE Epoch: 2021 12 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 12/09/2021   06:51:35   (   0.04,-137.20) (  -0.54,-139.77)  292.45                80
 12/10/2021   06:28:16   (   0.04,-137.21) (   0.58,-134.78)  276.96                80
 12/11/2021   18:49:47   (  -0.03,-137.21) (   0.46,-139.34)  242.27                80
 12/12/2021   18:26:27   (  -0.03,-137.21) (  -0.67,-134.34)  327.10                80
 12/14/2021   06:48:07   (   0.03,-137.21) (  -0.38,-138.93)  196.35                80
 12/15/2021   06:24:47   (   0.03,-137.21) (   0.74,-133.94)  372.62                80
 12/16/2021   18:43:39   (  -0.03,-137.21) (   0.29,-138.50)  147.69                80
 12/17/2021   18:25:39   (  -0.03,-137.20) (  -0.84,-133.51)  420.94                80
 12/19/2021   06:44:38   (   0.02,-137.19) (  -0.21,-138.09)  103.87                80
 12/20/2021   06:21:19   (   0.02,-137.18) (   0.92,-133.10)  464.30                80
 12/21/2021   18:40:10   (  -0.01,-137.16) (   0.11,-137.66)   57.34                80